People will eventually be identified individually, as inevitably as the people in the AOL search leak years ago. Then they -- and their blood relatives -- will be associated with negative health traits.

And then, companies will discriminate -- in hiring, in insurance... anywhere they can. Because it will be financially advantageous to individual companies even though it is detrimental to society as a whole. Because companies are amoral organisms and it is folly to expect them to behave otherwise.